linux-kernel - Re: use generic DMA mapping code in powerpc V4

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Message-ID: <53c18168393e3134f7e4120a2528f972b1002c01.camel@kernel.crashing.org>
Date:   Fri, 30 Nov 2018 14:17:42 +1100
From:   Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:     Christoph Hellwig <hch@....de>, Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-arch@...r.kernel.org, linux-mm@...ck.org,
        iommu@...ts.linux-foundation.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: use generic DMA mapping code in powerpc V4

On Tue, 2018-11-27 at 08:42 +0100, Christoph Hellwig wrote:
> Any comments?  I'd like to at least get the ball moving on the easy
> bits.

So I had to cleanup some dust but it works on G5 with and without iommu
and 32-bit powermacs at least.

We're doing more tests, hopefully mpe can dig out some PASemi and
NXP/FSL HW as well. I'll try to review & ack the patches over the next
few days too.

Cheers,
Ben.

> On Wed, Nov 14, 2018 at 09:22:40AM +0100, Christoph Hellwig wrote:
> > Hi all,
> > 
> > this series switches the powerpc port to use the generic swiotlb and
> > noncoherent dma ops, and to use more generic code for the coherent
> > direct mapping, as well as removing a lot of dead code.
> > 
> > As this series is very large and depends on the dma-mapping tree I've
> > also published a git tree:
> > 
> >     git://git.infradead.org/users/hch/misc.git powerpc-dma.4
> > 
> > Gitweb:
> > 
> >     http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/powerpc-dma.4
> > 
> > Changes since v3:
> >  - rebase on the powerpc fixes tree
> >  - add a new patch to actually make the baseline amigaone config
> >    configure without warnings
> >  - only use ZONE_DMA for 64-bit embedded CPUs, on pseries an IOMMU is
> >    always present
> >  - fix compile in mem.c for one configuration
> >  - drop the full npu removal for now, will be resent separately
> >  - a few git bisection fixes
> > 
> > The changes since v1 are to big to list and v2 was not posted in public.
> > 
> > _______________________________________________
> > iommu mailing list
> > iommu@...ts.linux-foundation.org
> > https://lists.linuxfoundation.org/mailman/listinfo/iommu
> ---end quoted text---

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